Drawing-press.



H. J. HI NDE, F. ORTON & B. J. LINDGREN.

DRAWING PRESS. APPLICATION FILED APR.9,1913.

L$9$58g Patented Mar.1l0, 1914..

4 $HEETB*SHBET 1.

WITNESSES:

INVENTORS Amq JYM Jm @W wwc I 11.3. HINDE, F. ORTON & B. J. LINDGREN.DRAWING PRESS.

APELIOATION FILED APRHQ, 1913.

1,089,558.. Patented Mar. 10, 1914.

4 SHEETS-SHEET 2.

WITNESSES: INVENTORS p Waa 7 w WZCQ' H. J. HINDE, F. ORTON 8: B. J.LINDGREN.

DRAWING PRESS.

APPLICATION FILED APR.9,1913.

Patented Mar. 10, 1914.

4 SHEET8-SHEET 3.

WITNESSES: 0%. c. m

H. J. HINDE, F. ORTON & B. J. LINDGRBN. DRAWING PRESS.

APPLICATION FILED APR.9, 191s.

55 Patented Meir. 1( 1914.

. SHEETSQHBET 4.

Fig.5.

g g 5 g q l o g 5 9. 9) I; j h FL g y w D [31D] 1' n .2 fll 11 El! M UWITNESSES: INVENTQRJ HENRY J. HINJDJE, FEEDER/TC ORTON, A1\TD BROB, J.LINDGREN, F TOLEDO, OHIO, ASSIGNORS TO THE TOLEDO MACHINE & TOOLCOMPANY, OF TQLEDO, OHIO, A

CORPORATION OF OHIO.

DRAWING-PRESS.

noaaass.

Specification of Letters Patent.

Patented Mar. illll, 11914:.

Application filed April 9, 1913. Serial No. 759,889.

g of Toledo, in the county of Lucas and State llli of Ohio, haveinvented a certain new and useful Drawing-Press; and we do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the characters of reference markedthere-on, which form a part of-this specification.

This invention relates to drawing or toggle presses and particularly tothe mechanism employed for communicating the requisite movements anddwell to the blankholder from the customary crank-shaft or otheroperating means.

The object of our invention is the provision of an improved mechanism ofthis class which will permit a prolonged absolute dwell or rest of theblank-holder in workblank holding position during the work drawing orforming movements of the press plunger, thus enabling the performanceofdeep drawing or stamping, and materially enhancing the practicabilityand commercial value of presses of this character.

Further objects and advantages of the invention will be apparent fromthe following detailed description thereof.

The invention is fully described in the following specification, andwhile, in its broader aspect, it is capable of embodiment in numerousforms, a preferred and one slightly modified embodiment thereof areillustrated in the accompanying drawings, in which,

Figure l is a front elevation of a press embodying the invention withthe blankholder and plunger at the limits of their down-strokes, Fig. 2is a side elevation. thereof, Fig. 3 is a reduced top plan view of theframe and upper portion of the blank-- holder moving mechanism withparts re moved, Fig. 4 is a diagrammatical view of the mechanismembodying the invention, illustrating the movements thereof during thedwell of the blank-holder, and Fig. 5 is a front elevation of a machineembodying a slightly modified form of the invention.

Referring to the drawings, 1 designates the body or frame of the press;2 the die bed upon which the matrix (not shown) is placed; 3 theblank-holder; 4: the press plunger having a forming head or die suitableto the matrix; 5 the crank-shaft having :the inner double cranks 6operatively connected to the press plunger by pitmen 6, said shafthaving a crank 7 at one end there of without the frame and also havingits ends geared without the frame, in the present instance, in asuitable manner to adri've shaft 8.

The crank 7 of the crank-shaft is connected by a pitman or bar 9 to asubjacent slide-block 10, which is mounted for vertical reciprocatorymovements between suitable guides 11 on the associated side of the pressframe. The block 10 is in turn connected by a bar or link member 12 tothe outwardly projecting arm of a superposed bell-crank lever 13, whichis fulcrumed in a bracketarm 14 projecting outwardly from the upperportion of the frame head l transversely thereof, the rockingmovementsof the lever being transverse to the frame. The other arm ofthe lever 13, in the present instance, projects upward from its fulcrumand is connected by a triangular link member 15 to the upwardlyprojecting arm of each of a pair of bell-crank levers 16, which aremounted at the front and back sides of the frame head on studs 17projecting therefrom near its vertical center.

A vertical centrally-disposed guide-way 10 is provided in each of thefront and rear sides of the frame head 1*, and working in each is aslide-block 19,'which is conneeted by a link 20 to the other arm of theadj acent bell-crank lever 16 from that to which the link member 15 isconnected. Bell-crank levers 21 are disposed at opposite sides of eachblock 19, being mounted on studs 22 projecting from the respective sidesof the frame head, and each has a vertically-disposed arm connected by alink 23 to the ad jacent block 19, and has its other arm,wihch, in thepresent instance, projects outwardly fro-m the lever fulcrum or awayfrom the block 19, connected by an outwardly extending link 24 to theupwardly and rearwardly extending arm of a lever 25, one of which leversis disposed above each corner portion of the blank-holder 3 on a stud orother suitwardly projecting arm of each lever 25 cooperates with a link27 to provide a toggle connection with the subjacent portion of theblank-holder, whereby a rocking of the levers 25 will effect a raisingand lowering of the blank-holder. I

It is evident from the above described arrangement of links, levers andsliding blocks that an upstroke of the block 10 will communicate adownstroke to the center blocks 19, which in turn efiect a straighteningof the toggle connections between the levers 25 and blank-holder, and aconsequent downstroke of the blank-holder, and vice versa.

From the diagram shown in Fig. 4 it will be noted that with the presentarrangement the crankshaft arms 6, which are connected to the plunger,stand at a, or slightly below the horizontal center of their downstrokeswhen the crank-pin 7, which is connected to the slide-block 10, standsat c, or at approximately 45 degrees short of the vertical center of itsupstroke, and that during the approximate 90 degree movement 01,-?) ofthe crank 6 and 0d of the crank 7 the blankholder will stand at absolutedwell or rest, the distance of movement of the different parts duringsuch dwell period being indicated by the full and dotted lines. It willbe apparent from this that while the blankholder is at absolute dwell orrest during approximately a 90 degree movement of the crankshaft, thedwell, in reality, is of greater duration than this, as there is noappreciable movement of the blank-holder during the final or initialportions of the straightening and breaking movements, respectively, ofthe toggle connection between the levers 25 and blank-holder.

It is evident with the arrangement shown that the axes of the differentlevers extend from front to rear of the press instead of cross-wisethereof, as is customarily the case, and that the movements of thecenter blocks 19 are substantially equal to the movement of theslide-block. 10, and that therefore, the loss of movement which occursbetween the crank-shaft and blank-holder takes place mainly or whollybetween the slide-blocks 19 and the levers 25.

In Fig. 5 the construction is the'same as that above described exceptthat the form of the levers between the center blocks 19 and togglelinks 27 is slightly changed. In this form the levers to which thecenter-block l1nks 23 connect are designated 21 and are 7 connected bylinks 24: to the levers 25 mounted on the studs 26. Ilhe levers 21, instead of being of bell-crank form, are substantially straight and, whenthe blocks 19 I are at the limits of their down strokes, stand inupright positions, while the upper arms of the levers 25 are inclinedinwardly instead of outwardly, as in the case of the levers 25. Thischange in the forms of the is not limited to any specific form,construction, or arrangement of the parts, except in so far as suchlimitations are specified in the claims.

Having thus described our invention,what we claim as new, and desire .tosecure by Letters Patent, is,

1. In a drawing press, a blank-holder, a crank, a member reciprocallymovable by the crank in the plane of movement of the blankholder and invertically spaced relation thereto, means operable by a turning of thecrank to reciprocate said member, and mechanism connecting said memberand blankholder for controlling the movement. of the latter and causingit to dwell during a portion of each revolution of the crank.

2. In a drawing press, two vertically spaced members reciprocallymovable in a common plane, a crank, means operable by a turning of thecrank to reciprocate one of said members, and means connecting saidmembers for imparting differential move-. ments from one to the otherthereof when the crank is revolved.

8. In a drawing press, two members recip rocally movable in a commonplane and being in permanent vertically spaced relation, a crank, meansoperable by a turning of the crank to reciprocate one of said members,

and lever and link connection between said caused to dwell during aportion-of the movement of the other member.

5. In adrawing press, a blank-holder, a crank, two reciprocally movablemembers one movable at a side of and one above the blank-holder, meansoperable by a turning of the crank to reciprocate one of said members,means for communicating reciprocating movements from one to the other ofsaid members, and means connecting the member, which is driven by thecrank-driven member, to the blank-holder for causing the blank-holder todwell during a portion of the revolution of the crank.

6. In a drawing press, a blank-holder, a

Loeaate crank, a reciprocally movable member disposed in the plane ofmovement of the blankholder, means for communicating reciprocatorymovement to said member from a revolution of the crank, and multipleconnection between said member and blankholder and located above theblank-holder for moving the member and causing it to dwell duringdiflerent portions of a revolution of the crank,

7. In a drawing press, a frame, a blankholder working therein, a crank,a member reciprocally movable in the head portion of the frame over theblank-holder, means for imparting reciprocatory movements to said memberfrom a revolution of the crank, and means connecting said member andblankholder for moving the latter and causing it to'dwell duringdifferent portions of a'revo lution of the crank.

8. In a drawing press, a frame, a blankholder movable therein, a membermounted for reciprocatory movements in the center ortion of the frame invertically spaced reation to and in the plane of movement of theblank-holder, means for communicating reciprocatory movements to saidmember from a revolution of the crank, and lever and link connectionbetween said member and blank-holder for moving the blankholder duringone 'aortion and causing it to dwell during anot er portion of arevolution of the crank.

9. In a drawing press, a frame having a head portion, a blank-holdermovable in the frame, a slide block reciprocally movable in the headportion .of the frame, means for imparting reciprocatory movements tosaid block from a revolution of the crank, and multiple connectionbetween said block and blank-holder and located above the blankholderfor moving the blank-holder during one portion and causing it to dwellduring another portion of a revolution of the crank.

10. In a drawing press, a frame, a blankholder movable therein, a crank,a block mounted for vertical reciprocatory move ments in the center ofthe head portion of the frame, means for communicating reciprocatorymovements to said block from a revolution of the crank, and a pluralityof lever and link connections between said block and blank-holder andlocated above .the blank-holder for causing the blank to the otherthereof, and means connecting said second block and blank-holder andlocated above the blank-holder for communicating reciprocatory movementsfrom one to the other thereof and causing the blank-holder to dwellduring a portion of a revolution of said crank.

12. In a drawing press, a frame, a blankholder movable therein, a crank,a block mounted for reciprocatory movements at a side of the frame,driving connection be; tween said crank and block, a second blockmounted for reciprocatory movements in the head portion of the frame,lever and-link connection between said blocks for communicatingreciprocatory movement-s from one to the other thereof, and a pluralityof connections between said second block and blanle holder located abovethe blank-holder for imparting movements to the blank-holder from saidsecond block, and causing it to dwell during a portion of a revolutionof said crank.

13. In a drawing press, a frame, a blankholder movable therein, a crank,a plurality of blocks reciprocally movable in the head portion of theframe, means for communicating reciprocatory movements to said blocksfrom a revolution of the crank, and separate means connecting saidblocks and blank-holder for causing the blank-holder to move during aportion of a revolution of the crank and to dwell during another portionof a revolution of the crank.

14:. In a drawing press, a frame, a member reciprocally movable therein,a crank, a block mounted for reciprocatory movements in each of oppositesides of the head portion of said frame, means for communieatingreciprocatory movementsin unison to said blocks from a revolution ofsaid crank, and means connecting each block with said member tocommunicate reciprocatorymovements thereto from said blocks and to causeit to dwell during a portion of the movements of said blocks.

15. In a drawing press,,a frame, a member reciprocally movable therein,a crank, a'

plurality of blocks mounted for reciprocatory movements in the upperportion of said frame, a lever fulcrumed to the upper part ofthe frame,connection between said lever and crank for communicating movement fromone to the other thereof, connection between said lever and blocks forcommunicating reciprocatory movements in unison to the blocks when thelever is rocked and connection between said blocks and member to causethe member to move during a portion of the movements of said blocks andto cause it to stand at rest during other portions of the movements ofsaid blocks.

16. In a. drawing press, a frame, a blankholder reciprocally movable insaid frame, a crank, a block mounted for reciprocatory movements in theupper portion of said frame, means for communicating reciprocatorymovements to said block from a revolution of the crank, a lever at oneside of said block, a lever having link connection with said first leverand with the blank-holder, said levers being actuated by the movementsof said block to move said blank-holder during portions of the blockmovements and to cause the blank-holder to stand at rest during anotherportion of the movement of said block.

17. in a press of the character described, a frame, a blank-holdermovable therein, a

crank, ablock reciprocally movable in the upper portion of said frame,means for communicating reciprocatory movements to said block from arevolution of the crank, and multiple lever and link connection betweensaid block and blank-holder for moving the blank-holder during a portionof the revolution of said crank and causing it to stand at rest duringanother portion of a revolution of the crank, said levers having theiraxes extending from front to rear of the frame.

18. In combination, a press frame, a blank-holder movable therein, acrank-shaft, a plunger movable by a revolution of said shaft, a membermounted for reciprocatory movements in the upper portion of said frame,means operable to communicate reciprocatory movements to said memberfrom said plunger, and multiple lever and link means located above theblank-holder and connecting said member and blank-holder and operable byrecip-rocatory movements of the member to impart movements to theblank-holder which are difl'erential to the crank-shaft actuatedmovements of the plunger andto cause the blank-holder to stand at restduring a portion of the movements of the plunger.

19. ln combination, a press frame, a blank-holder vertically movabletherein, a crank, a reciprocally movable member located above theblank-holder in the upper portion of the frame, means connecting saidcrank and member for communicating reciprocatory movements to the memberfrom a revolution of the crank, a pair of levers located at one side ofsaid member, one lever having vertically and horizontally disposed armsand the other lever having upright arms, connection between the verticalarms, connection between the vertical arm of the first mentioned leverand said member, connection between the horizontal arm of the firstmentioned lever and the upper arm of the other lever andconnectionbetween the lower arm of the other lever and the blank-holder wherebythe blank-holder is permitted to dwell during a portion of thereciprocatory movements of said member.

noeasae 20. In a press of the character described, a frame, ablank-holder movable therein, a crank, a block reciprocally movable inthe upper portion of the frame above the blankholder, means forcommunicating reciprocatory movements to the block from a revolution ofthe crank, and means extending right and left from said block andconnecting it with the blank-holder for permitting the blank-holder todwell during a portion of the movements of said block.

21. lin a press of the character described, a frame, a blank-holdermovable therein, a crank, a block reciprocally movable in a verticalplane at a side of the blank-holder,

connection between said crank and block for imparting movements from oneto the other thereof, a member reciprocally movable in the upper portionof the frame above the blank-holder, separate lever and link connectingmeans extending right and left from to the other thereof, said separatemeanseach having levers forming parts thereof with their axes extendingfrom front to rear of the press.

23. In a press of the class described, a frame, a blank-holdermovable inthe frame, a crank, a plurality of members mounted for reciprocatorymovements in the frame above the blank-holder, means for imparting likerecipr'ocatory movements in unison to said members from a revolution ofthe crank, and lever and link connections extending in oppositedirections from each of said members and connecting it to theblankholder for communicating reciprocatory movements from said membersto the blankholder and causing the blank-holder to dwell during aportion of the movements of said members.

24. In combination in a press of the class described, a frame, ablank-holder reciprocally movable in said frame, a crank, a slide blockvertically movable in a part of the frame at a side of the blank-holder,connection between said crank and block for imparting respectivemovements from one to the other thereof,'a plurality of members mountedfor vertical reciprocatory movements in the upper portion of the frameabove the blank-holder, linkand lever means connecting said block andmembers for communicating reciprocatory movements from the block to themembers, and right and left link and lever connections extending fromeach of said members to different por tions of the blank-holder forimparting reciprooatory movements from the members to the blank-h0lderand causing the blankholder to dwell during a portion of the movementsof said members, the axes of the levers of said connections extendingfrom front to rear of the frame.

In testimony whereof, We have hereunto signed our names to thisspecification in the 15

